It's an invisible ingredient, really, palm oil. You won't find it listed on your margarine, your bread, your biscuits or your KitKat. It's there though, under "vegetable oil". And its impact, 7,000 miles away, is very visible indeed.
The wildlife-rich forests of Indonesia and Malaysia are being chain-sawed to make way for palm-oil plantations. Thirty square miles are felled daily in a burst of habitat destruction that is taking place on a scale and speed almost unimaginable in the West.
When the rainforests disappear almost all of the wildlife – including the orangutans, tigers, sun bears, bearded pigs and other endangered species – and indigenous people go. In their place come palm-oil plantations stretching for mile after mile, producing cheap oil – the cheapest cooking oil in the world – for everyday food.